Lipase-Catalyzed Second-Order Asymmetric Transformations as Resolution and Synthesis Strategies for Chiral 5-(Acyloxy)-2(5<i>H</i>)-furanone and Pyrrolinone Synthons
作者:Hanneke van der Deen、Agnes D. Cuiper、Robert P. Hof、Arjan van Oeveren、Ben L. Feringa、Richard M. Kellogg
DOI:10.1021/ja953812h
日期:1996.4.24
By use of lipase R (Amano, Penicillium roqueforti) immobilized on Hyflo Super Cell it is possible to convert at ambient temperature 5-hydroxy-5H-furan-2-one (5) to acetic acid 5-oxo-2,5-dihydrofuran-2-yl ester (1b) by acylation with vinyl acetate in 1:1 cyclohexane−butyl acetate. At 90% conversion the enantiomeric excess of 1b is 100%. This is an example of an enzyme-catalyzed second-order transformation